Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X25
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X25 is a genuine double-acting ISO 15552 profile cylinder with a Ø200mm bore, 25mm stroke and a built-in spring-applied, air-released mechanical lock in the front cover — it holds the load at the extended (rod-out) stroke end even when air is lost.
- BoreØ200 mm
- Stroke25 mm
- Port sizeG3/4
- Lock positionFront cover
- Rod threadM36×2
- UnlockAir + manual
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X25
The AirTAC SAILF200X25 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. It delivers massive thrust, pushing 15708 N and pulling 15080 N at 0.5 MPa, making it suited for heavy-duty load control. The lock is spring-applied and air-released, meaning it automatically engages a lock pin into the rod when the piston reaches the extended stroke terminal. This securely holds the load in the rod-out position without requiring continuous live pressure.
Unlike a plain SAI cylinder, this unit provides true power-failure safety, though the lock engages only at the stroke end rather than clamping at an arbitrary mid-stroke point. The variable air cushion at the locker end is notably shorter, measuring 28 mm compared to the 50 mm cushion on the free end, which is a critical spec for machine designers to account for during end-of-stroke deceleration. The standard carbon steel rod and PT tapered port threads ensure robust, leak-free pneumatic connections.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X25 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X25 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø200 mm |
| Stroke | 25 mm |
| Acting type | Double acting, with lock |
| Port size | G3/4 |
| Rod thread | M36×2 |
| Lock type | Spring-applied, air-released (front cover) |
|---|---|
| Unlock | Automatic (air) & manual |
| Operating pressure | 0.15 – 1.0 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable (50 mm free end / 28 mm lock end) |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAIL datasheet (ISO 15552). Confirm against the product label before installation. Port options: PT / G.
How the Lock Holds
The lock is spring-applied and air-released: a spring drives a lock pin into the rod when the release air is removed, so the load is held at the extended (rod-out) stroke end without live pressure. Supply air to the release port to unlock automatically, or use the manual release lever.
The lock engages only when the piston reaches the stroke terminal on the front-cover side — it is a static end-of-stroke hold, not a mid-stroke clamp and not a moving-rod brake. For locking at any position along the stroke, choose a BSAI clamp-lock instead.
Theoretical Output Force (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 kgf | |
Cylinder thrust is separate from the lock's holding capability. Actual usable force is lower than theoretical due to friction and back-pressure — size with a margin.
Where the Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X25 Is Used
Heavy Lift Holding
Secures massive elevated loads in the extended position instantly upon air pressure loss, preventing crashes during power failures.
Press Clamp Safety
Maintains high-force clamping pressure at the rod-out stroke end without consuming continuous compressed air.
Gate Safety Lock
Locks heavy industrial gates or safety barriers in the open extended position, requiring an intentional air signal to unlock.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X25 the Right Lock Cylinder?
Choose this 200 mm bore model when your application demands extreme force that smaller bores cannot provide, such as stepping up from a 160 mm bore that offers 10053 N push at 0.5 MPa. Select the SAILF configuration specifically because you need the load held securely at the extended rod-out position; if your process requires holding at the retracted position, the SAILB variant is the correct choice. For applications requiring locking at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the necessary alternative.
Remember that this is a static holding lock that engages after the cylinder stops, not a dynamic brake for a moving rod. Valve selection is critical: do not use a fast-exhaust valve, as back-pressure on the locker side can unintentionally release the lock; an independent-exhaust solenoid valve is required. If human safety depends on the load remaining extended, always add an independent mechanical safety measure. To replace this unit, match the 200 mm bore, 25 mm stroke, front locker position, PT port threads, and standard carbon steel rod.
Quick checklist
- ✓ Hold needed at the extended (rod-out) end?
- ✓ Or lock anywhere → use BSAI
- ✓ Independent-exhaust valve fitted
- ✓ Port/thread type (PT/G)
- ✓ Extra safety measure for people
Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X25 FAQ
The 200 mm bore provides a push thrust of 15708 N and a pull thrust of 15080 N at 0.5 MPa. At 0.7 MPa, the push force increases to 21991 N.
The lock is spring-applied and air-released, engaging only when the piston reaches the extended stroke end. It provides a static hold, not a dynamic brake, and is unlocked automatically via air or manually. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X25
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.